Pipeless furnace



H. LECHLEITNER rIPELEss FURNAGE Filed April 14, 1925 3 Sheets-Sheet 1@not nu,

Dec. 8, 1925.

H. LECHLEITNER PIPELESS FURNACE Filed April 14, 1925 3 Sheets-Sheet 2Dec. 8,1925. l y

H. LECHLEITNER PIPELESS FURNACE Filed April 14, 1925 5 Sheets-Sheet 5 Ov' o o o o o@ Oo g O atto: u1

Patented Deo,

PATENT OFFICE.

HENRY LECHLEITNER, OF AKRON, OHIO.

PIPELESS FURNACE.

Application filed April 14, 1925.

To all whom 'it may concern:

Be it known that I, HENRY LneHLnrrNnn,

a citizen of the United States, residing at Akron, in the county ofSummit and State of Ohio, have i vented certain new and usefulimprovements in a Fipeless Furnace,

of which the following is specification.

y This invention relates to an improved hot air furnace, and it hasparticular reference tothe so-called pipeless variety.

lt is my principal aim to generally improve upon furnaces of this classby providing one wherein the air is circulated in a tortuous manner toContact various heated surfaces and to absorb and carry with it heat forpassage through the outlet to the room, whereby to obtain a degree ofheat which is more intense than has heretofore been attained with knownfurnaces of this type.

It is a feature of the invention to incorporate in the structure, at thebottom, a 'pan for containing water and conducting the air over thesurface of the water so that the heated air eventually7 escaping intoVthe room is nioistened, and not overly dry, 'as is ordinarily the casewith a pipeless fur- ',DlC.v

Another and highly important feature is the central unit surrounded bythe main casing, this unit comprising a vertical cylinder in which thefire pot is located, and this cylinder being fashioned to provide theaforesaid water pan, and there being a discular hollow drum carried onthe upper end thereof and serving as a means for `superheating the airprior to its escape through the outlet.

Other features of construction and advantages derived therefrom willbecome apparent from the following description and drawings.

ln the accompanying drawings forming a part of this application, and inwhich like numerals are employed to designate like parts throughout thesame:

Figure l is a view in elevation, and section observing the front of apipeless fur nace constructed in accordance with the present invention.

Figure 2 is a substantial central vertical section through the same at aright angle to Figure l.

Figure 3 is a horizontal section through the superheator drum, thesection being Serial No. 23,016.

taken approximately upon the plane of the line 3 3 of Figure l.

Figure t is a horizontal section taken on the plane of the line fi-l ofFigure l.

.Figure 5 is a detail view of a valved cold air vent.

Figure 6 is a bottom plan view of a casting which is confined in theaforesaid drum.

Figure 7 is an enlarged top plan view of a heat absorbing coil carriedby said casting.

Considering the central unit of the furnace first, it will be seen thatthe same comprises a hollow cylindrical shell l, vertically disposed andfashioned at its bottom to provide a water pan 2. At vertically spacedpoints adjacent its bottom and at its center this shell is formed withrelatively large openings from which tubular connectors 3 and 4 extend.In a diametrically opposite point at the top the shell is formed with anopening with which a smoke pipe 5 is connected, there being a hingedsection 6 in association with this pipe, and said section being locatedwithin the shell l. As before indicated, an air super-heating drum 7rests upon the top of this shell and is of a diameter slightly less thanthe complete diameter of the furnace as a whole. The drum preferablycomprises an apertured top plate S, a bottom plate 9, and an ntervem'ngannular band 10, thus making a hollow cylindrical drum. The drum is ofconsiderably greater diameter than the cylindrical shell l, and thatportion of the bottom plate 9 over the shell is imperforate. Both platess 8 and 9 however are provided adjacent their peripheries with holes toaccommodate short vertical pipes 11 permitting passage of the heated airfrom the body proper.` Surrounding the shell l in circumferentiallyspaced relation and communicating with thc air drum 7 are relativelysmall tubes 19, the same being provided with restricted openings attheir bottom as shown in Figure 1. Located in this drum is an ironcasting 13 formed with small apertures 14 and upon its under side withopen bottom cells l5. Cast steel coils 17 are housed in these cells, andin this connection I would state that the wire from which each coil isformed is eX- tended through an opening in the casting, and is screwthreaded for reception of the nuts as shown in Figure 5. The coils areheld properly in place in this manner. lt should also be noted thatsuiiicient clearance is provided between the coils and the cells topermit effective absorbing of the heat by the coils. The casting isconnected to the top plate 8 by a bolt or the like 18. Surrounding theshell 1 and the heating drum, is the main casing 19, the saine beingformed of sheet material, and being cylindrical in horizontal section.As shown more plainly in Figure l, the ends of the sheet are bent toprovide flanges, and these are appropriately secured together. The upperend of the casing terminates on a plane with the top plate of the airdrum, and a conical top 2O is fitted thereon, and is provided. with acentral hot air discharge neck 21 adapted to communicate with the usualregister (not shown). lnterposed between and spaced ,from the shell andthe casing is an annular partition 22 dividing the space into passages23 and 211. It will be observed from Figure 2 that this partitionterminates in spaced relation above the water pan. It will also be notedfrom Figure l that the partition, like the casing, is formed from asingle piece of sheet material having its meeting ends anged and boltedtogether between the flanges on the main casing. lf desired, asbestosmay be interposed to provide a heat-tight seam. From Figure 2 it will beseen that the Lipper end of the partition is inclined outwardly asindicated at 25, and is then bent as at 26 and properly fastened to theinternal face of the casing. The casing is provided at this point withcircuinferentially spaced cold air intakes 27, and the incoming air isdeflected downwardly by the inclined portion 25.

The front wall of the casing is provided with a rectangular openingclosed by a cast plate 28 riveted or otherwise secured in place, andthis plate carries the main door 29 and also an ash pit and draftregulating door 30. Each of these doors includes a hinged closure 31 towhich a pull chain is connected, these pull chains being adapted toextend upwardly into the house to be manipulated.

Supported within the shell 1 is a fire pot 32, held in spaced relationabove the bottom of the furnace, and this fire pot is provided with ahinged downwardly swinging grate structure 33 of appropriateconstruction. The grate preferably comprises a hinged section 34carrying a relatively rotatable valve section 35, the hinged sectionbeing provided with a latch 36 for holding it in closed position. Accessmay be had to the grate through the connector l and bottom door 30.

Directing attention to Figure 5, it will be seen that a row of ventholes 37 is formed in the casing wall. rl`here may be any number ofthese rows. Surrrnindingthe holes is a channel shaped keeper 38 and anapen tured sliding shutter 39 is mounted in the foregoing descriptionand drawings it will be seen that l have evolved and produced a novelpipeless hot air furd nace wherein the cold air is compelled to take atortuous passage so that it will be thor-V oughly heated beforeescaping` from ythe furnace and into the house. Under the arrangementsliown, formation of a vacuum is practically impossible, and for thisreason a good draft is assured at all times, and consequently a rapidcirculation of air takes place. The air, having affinity for the water,will sweep over the surface of the same and be inoistened on its waythrough the passages. The superheating drum di-A rectly ovei' the firepot will be intensely heated, and air entering this will be heated to avery high degree. Likewise, the casting and heat absorbing coils willtake up good deal of the heat during the operation of the furnace, andeven after the dampers have been closed, and the fire allowed to diedown, a goodly amount of heat will nevertheless emerge from the furnace.ln fact, even after the fire is out, the heating drum and heat absorbingelements therein will suffice to radiate heat through the outlet andinto the room. Obviously, then the 1practicability of an arrangement ofthis kind is clear. lnasmuch as the details have been specificallydescribed, it is thought that a clear understanding of the inventionwill now be had. Therefore, a more lengthy description is thoughtunnecessary.

Minorchanges coming within the invention claimed may be resorted to ifdesired.

{aving thus described the invention, what l claim as new and desire tosecure by Letters Patent is 1. In a furnace of the class described, acasing, a shell located in said casing, said shell being hollow anddisposed vertically, a bottom connected with the lower end ofv theshell, said bottom being fashioned toI provide a water containing pan,an air heating drum at the top of said shell, said drum, shell and panbeing a single unit, and a heat absorbing and radiating means located insaid drum and comprising a casting einbodying cells in which heatabsorbing coils are conned.

2. In a furnace of the class described, a hollow cylindrical verticallydisposed shell having a bottom portion fashioned to provide a watercontaining pan, a hollow circular heating drum resting on top andprojecting beyond said shell, said drinn being 0f a diametersubstantially equal to the diameter of said water containing pan, a casing surra'unding said drinn and pan and spaced from said shell, a headsurrounding said casing and disposed above said drum,

'10 lation above said Water pan7 a partition Wall associated at its topwith said casing and drum and depending in the space be tween the casingand shell and providing air passages, said partition terminating inspaced relation above said Wat-e1' pan, and heat absorbing and radiatingmeans located in said drum.

In testimony whereof I niy signature.

HENRY LECHLEITNER.

